Coal-tower-trolley-boom swinger.



H. L. HURD. GOAL TOWER TROLLEY BOOM SWINGBR.,

APPLICATION FILED M1319; 1910.

Patented Jan. 10, 1911. 4

5 SHEETS-SHEET 1 ca.. WASHINGTON. n. c.

H. L'. EURL] GOAL TOWER TROLLEY BOOM SWINGER.

ARELIOATION FILED MAB.19. 1910.

981,268. Patented Jau 1-0, 1911.

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H. I.. HURD-a GOAL TOWER TROLLEY BOOM SWINGER.

APPLICATION FILED 11113.19. 19m.

Patented Jan. 10, 1911. y

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H. L. HURD.

COAL TOWER TROLLEY BOOM SWINGER.

APPLICATION FILED MAB. 19, 1910l Panama Jan. 10,1911.

WHL/765565:

GOAL TOWER TROLLEY BOOM SWINGER.

APPLIOATION FILED MAB..19, 1910.

981,268. Patented Jan. 10, 1911.

5 SHEETS-SHEET 5.

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HENRY L. HURD, OF BOSTON, MASSACHUSETTS.

COAL-TOWER-TROLLEY-BOOM SWINGER.

Specification of Letters Patent.

Patented J an. 10, 1911.

Application filed March 19, 1910. Serial No. 550,369.

To all whom it may concern;

Be it known that I, HENRY L. I-IURD, a citizen of the United States,residing at Boston, county of Suffolk, State of Massachusetts, haveinvented a certain new and useful Improvement in Coal -Tower Trolley-Boom Swingers, of which the following is a specification, referencebeing had therein to the accompanying drawings.

The invention relates to an improvement for use in coal towers forunloading the cargo. The vessel to be unloaded usually hauls upalongside of the wharf. The grab shovel by which the coal is scooped upand lifted from the vessel is suspended and manipulated by cables whichare run over a trolley carriage which travels on a boom which projectsout over the vessel from the tower. This boom is pivoted on a needle andhung on outside stays to give it support.

Heretofore the boom has been swung out by two rope tackles which arestationary over the center of the hatch for discharging. The coal istaken out from the hatchway and after getting all of the coal that canbe grabbed, the shovel is pushed by two or more men to reach the coaleach side of the bare floor thwart-ships.

I-Ieretofore so far as is known to me no mechanism has been employed toswing the shovel fore and aft.

The object of my invention is to provide mechanism whereby the shovelcan be given a fore and aft movement as well as amovement thwart-ships.I accomplish this by means of mechanism whereby the boom may be swung onits pivot so that the outer end will swing laterally in a horizontalplane.

The invention will be fully understood from the following descriptiontaken in connection with the accompanying drawings, and the novelfeatures will be pointed out and clearly defined in the claims at theclose of the specification.

In the drawings,-Figure 1 is a side elevation showing a portion of thecoal tower and hopper and a boom and operating mechanism constructed inaccordance with my invention. Fig. 2 is a plan showing the boom andoperating mechanism in central position. Fig. 3 is a plan of the partsshown in Fig. 2 showing the boom swung to the left. Fig. 4 is anenlarged plan of the boom cylinder and the inverted tackle in centralposition. Fig. 5 is a side elevation of the p arts shown in Fig. 4 alsoin center position. Fig. 6 is a plan of the tackle, the cylinder beingshown in section and showing lthe piston moved to the right in theposition that it would be when it swings the boom --to the left as inFig. 3. Fig. 7 is an enlarged elevation sectioned through the cylinderand the steam chests showing the piston in central position and thevalves in central position. Fig. 8 is a cross section through thecylinder and piston on line 8-8 of Fig. 7.

Referring now to t-he drawings,1 represents a portion of the coal towerand 2 the hopper into which the coal is dumped by the shovel after beinglifted from the vessel.

3 is the cross-tree to which the boom is pivotally connected. This boomconsists of two parallel beams M fastened together at their ends andforming tracks on which the trolley carriage travels. The trolleycarriage is mounted on two pairs of trolley wheels 5 5. The trolleycarriage is for the purpose of giving a thwart-ship motion to the shovelin the usual way. The two sheaves 6, 7 are carried by the trolleycarriage. The holding-on-rope 8 passes between the sheaves 6, 7 and isfastened to the head 9 of the shovel 10. The opening and closing cable11 passes over the outside of the sheave 7 and around the lower head 12of the shovel and is fastened to the upper head 9. The opening andclosing cable is for the purpose of opening and closing the shovel.Connected with the shovel is a guy wire 13 which runs over a sheave 14on the end of the boom and runs up to the upper part of the towerfrom-which a weight is hung to keep the shovel straight. The parts thusfar described are of well known construction.

rThe boom 4 is pivoted on the needle 15 whereby the boom is enabled toswing laterally, the needle having a knuckle-joint 16 whereby the boommay be swung in a vertical plane.

Two sheaves 17, 18 are shackled to one side of the boom, for instancethe left hand side as viewed in Fig. 2, at some distance apart from eachother and two corresponding sheaves 19, 20 are shackled to the otherside of the boom. On the opposite ends of the cross-tree 3 are thethree-sheaved blocks 21, 22. In the engine room is a power cylinder 23.Within the cylinder there is provided a piston 24 which is reciprocablewithin the cylinder and from each end of the piston extends the pistonrods 25, 26 respectively which pass through the stutling boxes 27, 23respectively in the heads of the cylinder. The piston rod 25 hasconnected with its outer end a cross-head 29 which is reciprocable inguide ways in the fra-me 30. The piston rod 26 is connected with acrosshead 31 which is reciprocable in guide ways in the frame 32,

Projecting from the cross-head 29 are the two arms 33, 33, in which isjournaled a shaft 34 whose ends move in the same guide ways as thecross-head 29. Loose on the shaft 34 are a series of sheaves preferablyfour in number 35, 36, 37 and 38, each of said sheaves being rotatableon the shaft independently of the other sheaves on the shaft and all ofthe sheaves reciprocate together. with the cross-head 29. Mounted fastin the frame 30 is shaft 39 on which are loosely mounted a series ofsheaves one less in number than the sheaves on the shaft 34, saidsheaves being numbered respectively 40, 41 and 42. y

Projecting from the cross-head 31 are two arms 43, 43 in which isjournaled a shaft 44 on which is loosely mounted a series of sheaves 45,46, 47, 48 which travel with the cross-head 31 and mounted stationary inthe framev 32 also is a shaft 49 on which are loosely mounted thesheaves 50, 51 and 52 corresponding with the sheaves of the shaft 39already described.

A cable 53 whose end is fast to a holder 54 in the frame 30 runs backfirst over the sheave 38, thence on the under side of sheave 3S, andruns over the top of sheave 42, back over the top and around sheave 37,thence underneath and over the top of sheave 41, thence over the top andunderneath sheave 36, thence underneath and over the top of sheave 40,thence over the top and underneath sheave 35, thence around a sheave 55,thence over the top of block 21 thence around sheave 17,v thence backaround the middle sheave of block 21, thence around sheave 18 which isshackled to the forward end of boom 4, thence back and around the thirdsheave of block 21, and thence to the windlass 56 to which it isattached and acts as a tightener.

The cable 57 is fastened to one end in the frame 32 and thence runsaround over the top and under the sheave 48, thence underneath and overthe top of sheave 52, thence over and under the sheave 47, thence overand under the sheave 51, thence over and under the sheave 46, thenceover and under the sheave 50, thence over and under the sheave 45,thence around the sheave 59, thence over the top sheave of the block22., thence around sheave 19 which is shackled to the boom 4, thencearound the middle sheave of block 22, thence around the forward sheave2O which is shackled to the boom, thence around the lower sheave of theblock 22 and thence to the windlass 60 which acts as a tightener,similar to the windlass 56.

By reciprocating` the piston in either direction, the slidable membersof the inverted tackles connected therewith will be moved and the cableon one side will be paid out and the cable on the other side will betaken up, thereby swinging the boom. For instance, if the piston movesto the right from the position shown in Fig. 2 into the position shownin Fig. 6, the cross-heads 29 and 31 will be moved to the right, and thereciprocable shaft 34 together with the sheaves carried thereon willmove to the right away from the stationary shaft 39 and the sheavesmounted thereon, and the shaft 44 together' with its sheaves will bemoved toward the shaft 49 and its sheaves.

By turning the windlass 60 in a direction to pay out the cable 57 and atthe same time taking up the cable 53 by means of the windlass 56 theboom 4 may be swung to the left and by reversing the operation the boom4 may be swung to the right at any angle.

By means of a valve lever 61 and connecting mechanism which will bedescribed the piston 24 may be reciprocated so as to swing the boom bysteam or air power.

Connected with the cylinder 23 and near opposite ends are the two steamchests 62, 63 respectively. A steam pipe 64 connects with the pipe 65leading to the steam chest 62 and with a pipe 66 leading to the steamchest 63. The passage from the steam pipe 64 through the pipes 65 and 66into the steam chests 62 and 63 is always open. Leading from the steamchest 62 into the cylinder is a steam port 67 to admit steam from thesteam chest into the cylinder.

ALeading from the cylinder to the steam chest is an exhaust port 68which cushions the piston 24 when the piston 24 moves to the left handof the cylinder, as viewed in Fig. 7.

Leading from the steam chest 62 to the outside air is an exhaust cavity69 connecting with a pipe to the atmosphere. On the face of the steamchest is a D-slide valve 70 which opens and closes the steam andexhaustports 67 and 68. This slide valve 70 is connected by a valve rod71 to the lever 61. Leading from the steam chest 63 into the cylinder isa steam port 72 and leading out of the cylinder is an exhaust port 73and leading fro-m the steam chest also is an exhaust cavity 74connecting with a pipe to the atmosphere. The steam and exhaust ports 72and 73 are opened and closed by a D-slide valve 75 which is connected bya rod 76 with the lever 61. Leading through the side of the cylinder inthe middle thereof are a series of steam ports 77 which vlead into arelief chamber 78 attached to the side of the cylinder with which isconnected a relief valve 79.

The reason for providing the cylinder with separate exhaust and separatesteam ports at each end of the cylinder is so that when the pistoncloses one of the ports, the steam which is thereby held acts as acushion to the piston on that end of the cylinder, as already stated indescribing the steam port 67 and the exhaust port 68.

Vhen the lever 61 is in the central position as shown in Fig. 7, theadmission ports 67 and 72 are both openand the exhaust ports 68 and 78are both closed, and the boom is in central position, as in Fig. 2. Ifit is desired to swing the boom to theileft as in Fig. 3, the lever 61will be turned to the right as viewed in Fig. 7, thereby opening widerthe admission port 67 and leaving exhaust port 68 still closed andclosing admission port 72 and opening exhaust port 73 so that the steamwhich is now admitted through port ('37 will drive the piston 24 to theright as viewed in Figs. 6 and 7. This will let out the cable 57 and atthe same time the cable 53 will be drawn up corresponding with theletting out of the cable 57 so that the boom 4 will swing to the leftwithout any slack in either cable.

In order to bring the boom back into the center again the lever 61 isplaced central as shown in Fig. 7 and relief valve 79 is opened and withthe pressure coming into the cylinder through ports 72 and G7 with therelief valve 79 open, the pressure through port G7 against the left handface of the piston is thereby released and the piston will move to thecenter of the cylinder, as the openings 77 at the center are of greaterarea than the port 67 and will allow the pressure of steam to escapefrom the left hand face of the piston, thereby bringing the piston tothe center of the cylinder very gently as the two series of ports 77 areclosed one after the other by the piston rings.

The relief valve 79 may be operated by the foot or by hand in well knownmanner.

In the bottom of the cylinder are four drip valves 80, one near each endand one on each side of the piston when the piston is in centerposition. These drip valves are connected together by a single rod 81operated by a lever 82 so that the valves may all be opened or closedsimultaneously.

the right the lever G1 will be moved to the left.

While I have shown the sheaves on the movable shafts 34 and. 44 as beingfour in number and the sheaves on the fixed shafts 89 and 49 as beingthree in number the cxact number is immaterial so long as the number ofsheaves on the movable shaft is IVhen it is desired to swing` the boomto` i l l L without swinging the one more than on the stationary shaft.By increasing the number of sheaves a wider sweep of the boom, issecured and the piston area must be increased accordingly.V Also whilefor convenience in description I have referred to the power for drivingthe piston as being steam power, compressed air or any other suitableiiuid pressure may be employed. Also while I have described theapparatus as especially intended for use in unloading coal from vesselsit is not intended herein to limit the scope of the claims to the use ofthe apparatus for unloading any particular kind of cargo.

The cable used is preferably a wire cable on account of the great wearto which it is subjected.

I have described the invention thus far as employed in an apparatus inwhich the boom is supported by stay-cables and. for that reason theinverted tackles are employed and I have so described and illustratedthe invention because in connection with trolley booms the stays usuallyemployed are cables. It is obvious however that the trolley boom may bestayed by other means than cables in such a manner as to allow a.lateral swing of the boom.

I regard as coming within the scope of my invention the employment ofany stay mechanism intermediate the piston and the trolley boom which isactuated by the piston in the manner described herein.

By the employment of my apparatus above described, the shovel can alwaysbe lowered through the central hatchway and then swung either to theright or left as desired to swing it under the combings of the hatch toget the coal on the side, and then swung back to the center and hoistedout through the central hatchway again.

The operation will be in the following order, assuming that the boom isin the central position and the piston at center: Suppose, for instance,it is desired to remove the coal from under the combings on the lefthand side of the hatch. First, the shovel is lowered through the centralhatch boom; then the lever 61 is moved to the right, as viewed in Fig. 7and the piston 24 is driven to the right, as already described, thusswinging the boom to the left. The swinging of the boom to the left inthis way gives a pendulum movement to the shovel down in the hatch,carrying it under the combings where it will be manipulated to grab thecoalin the usual manner. rIhe lever moved back to the center while theshovel is being filled; then as soon as the shovel is filled, therelief-valve should be operated by foot or otherwise as alreadydescribed which will thereby swing the boom to the center, bringing alsothe shovel out from under the combings to the center of the hatch;

should be immediately` then the shovel will be hoisted and dumped whilethe boom still remains at the center; then the shovel will again belowered and after it is lowered it will again be swung to the left orswung to the right by the proper movement of the lever 61 in the mannerpreviously described.

What I claim is:

l. A trolley boom pivot-ally connected at one end to a support wherebythe boom is adapted to be swung laterally, side tackles connected withthe two opposite sides of the boom, two inverted tackles each connectedwith a movable cross-head, two tightening 'windlasses, a cable connectedwith each set of tackles and connected windlasses, one end of each ofsaid cables being made fast to the windlass and thence ruiming over oneset of side tackles and over the inverted tackle of its set and madefast to a support, a connection between the movable crossheads of thetwo sets of inverted tackles and means for reciprocating said connectionand cross-heads whereby the cable connected with one side of the boommay be taken up and the cable connected' with the other side will becorrespondingly let out, thereby swinging the boom in a lateral plane.

2. A trolley boom pivotally connected at one end to a support wherebythe boom is adapted to be swung laterally, side tackles connected withthe two opposite sides of the boom, two inverted tackles, two tighteningwindlasses, a cable connected with each set of tackles and connectedwindlasses, one end of each of said cables being made fast to thewindlass and thence running over one set of side tackles and over theinverted tackle of its set and made fast to a support, a cylinder, apiston movable within said cylinder, piston rods connected with theopposite ends of said piston and connect ed respectively with themovable cross-heads of the two sets of inverted tackles, means foradmitting fluid pressure to and exhausting it from said cylinder atopposite ends thereof, andvmeans whereby when the fluid pressure isadmitted at one end it may be exhausted at the other piston isreciprocated in either direction and one of said cables is taken up andthe other is correspondingly let out whereby the said boom is caused toswing in either lateral direction desired.

3. A trolley boom pivotally connected at one end to a support wherebythe boom is adapted to be swung laterally, side tackles connected withthe two opposite sides of the boom, two inverted tackles, two tighteningwindlasses, a cable connected with each set of tackles and connectedwindlasses, one end of each of said cables being made fast to thewindlass and thence running over one set ofl side tackles and over theinverted tackle of' its set and made fast to a support, a cylinendwhereby said der, a piston movable within said cylinder and piston rodsconnected with the opposite ends of said piston and connectedrespectively with the movable cross heads of the two sets of invertedtackles, means foradmitting fluid pressure to and exhausting it fromsaid cylinder at opposite ends thereof, means whereby when the fluidpressure is admitted at one end it may be exhausted at the other endwhereby said piston is reciprocated in either direction and one of saidcables is taken up and the other is correspondingly let out whereby thesaid boom is caused to swing in either lateral direction desired, valvesfor controlling the admission and exhaust of fluid pressure to and fromthe opposite ends of the cylinder disposed in such manner that the fluidpressure may either be admitted to one end and closed to the other endor may be admitted to both ends at the same time at the will of theoperator.

4. A trolley boom pivotally connected at one end to a support wherebythe boom is adapted to be swung laterally, side tackles connected withthe two opposite sides of the boom, two inverted tackles, two tighteningwindlasses, a cable connected with each set of tackles and connectedwindlasses, one end of each of said cables being made fast to thewindlass and thence running over one set of side tackles and over theinverted tackle of its set and made fast to a support, a cylinder, apiston movable within said cylinder, piston rods connected with theopposite ends of said piston and connected respectively with the movablecross heads of the two sets of inverted tackles, means for admittingHuid pressure to and exhausting it from said cylinder at opposite endsthereof, means whereby when the fluid pressnip is admitted at one end itmay be exhausted at the other end whereby said piston is reciprocated ineither direction and one of said cables is taken up and the other iscorrespondingly let out whereby the said boom is caused to swing ineither lateral direction desired, valves for controlling the admissionand exhaust of fluid pressure to and from the opposite ends of thecylinder disposed in such manner that the iuid pressure may either beadmitted to one end and closed to the other end or may be admitted toboth ends at the same time at the will of the operator, an operatinglever and valve rods connecting both of said valves with said leverwhereby said valves may be operated simultaneously to admit fluidpressure to one end of the cylinder to close the exhaust and to closethe admission to the other end of the cylinder and open the exhaust, ormay be moved to open the admission ports to both ends of the cylinderand close both the exhausts.

5. A trolley boom pivotally connected at one end to a support wherebythe boom is adapted to be swung laterally, side tackles connected withthe two opposite sides of the boom,two inverted tackles,two tighteningwindlasses, a cable connected with each set of tackles and connectedwindlasses, one end of each of said cables being made fast to thewindlass and thence running over one set of side tackles and over theinverted tackle of its set and made fast to a support, a cylinder, apiston movable within said cylinder, piston rods connected with theopposite ends of said piston and connected respectively with the movablecross-heads of the two sets of inverted tackles, means for admittingfluid pressure to and exhausting it from said cylinder at opposite endsthereof, means whereby when the fluid pressure is admitted at one end itmay be exhausted at the other end whereby said piston is reciprocated ineither direction and one of said cables is taken up and the other iscorrespondingly let out whereby the said boom is caused to swing ineither lateral direction desired, valves for controlling the admissionand exhaust of fluid pressure to and from the opposite ends of thecylinder disposed in such manner that the fluid pressure may either beadmit-ted to one end and closed to the other end or may be admitted toboth ends at the same time at the will of the operator, and a reliefvalve connected with the cylinder at the middle thereof whereby when thepiston is at one end of the cylinder, the pressure may be exhausted fromthe other end of the cylinder and by the admission of pressure to theother end of the cylinder the piston will be brought to the center andclose the ports leading` to the relief valve on the middle of thecylinder and thereby if the admission ports at each end of the cylinderare open the pressure upon each end of the piston will be equalized andthe boom will stand central.

6. A trolley boom pivotally connected at one end to a support wherebythe boom is adapted to be swung laterally, side tackles connected withthe two opposite sides of the boom, two inverted tackles, each invertedtackle comprising a stationary shaft on which are mounted a plurality ofsheaves, a movable shaft parallel with said stationary shaft andreciprocable laterally toward and from said stationary shaft and havingmounted thereon a plurality of sheaves, a movable cross-head to whicheach of said reciprocable shafts is connected, a connection between themovable cross-heads of the two inverted tackles whereby both of saidmovable cross-heads will move together in the same direction, two cablesrespectively running over the two sets of side tackles and invertedtackles, two windlasses, each of said cables being fast at one end to asupport and fast at the other end to one of said windlasses, and meansfor reciprocating said connected cross-heads whereby one cable may betaken up and the other cable will be correspondingly let out, therebyswinging the boom in a lateral plane.

7. A trolley boom pivotally connected at one end to a support wherebythe boom is adapted to be swung laterally, side tackles connected withthe two opposite sides of the boom, two inverted tackles, each invertedtackle comprising a stationary shaft on which are mounted a plurality ofsheaves, a movable shaft parallel with said stationary shaft andreciprocable laterally toward and from said stationary shaftl and havingmounted thereon a plurality of sheaves, a movable cross-head to whicheach of said reciprocable shafts is connected, a connection between themovable cross-heads of the two inverted tackles whereby both of saidmovable cross-heads will move together in the same direction, two cablesrespectively running over the two sets of side tackles and invertedtackles, each of said cables being made fast at both ends to supports,and means for reciprocating said connected cross-heads thereby swingingthe boom in a lateral plane.

In testimony whereof I afiix my signature, in presence of two witnesses.

HENRY L. HURD.

Witnesses WILLIAM A. COPELAND, ALICE H. MORRISON.

